Fivetech T100 Headset For NEC ASPIRE Nortel Norstar Meridian Avaya Polycom Mitel With Extra Free replacement ear leathered cushion cover and microphone cover. Direct connect headset is the most cost-effective headset solution designed to increase your productivity. This headset will not require any additional adaptor nor additional amplifier. They plug directly into the headset port at the back of your telephone. Compatiblity:Avaya Nec Aascom Mitel Polycom Intel 8520, 8560, 8600, 8620, 8660, 8662, 8690 IP Phone The headset complete with a 10-feet coiled cord with RJ9/RJ10/RJ12 headset or handset modular plug.